Tire-shield.



O. A. P. MITTELSTK'DT.

TIRE SHIELD.

APPLICATION FILED MAR. 11, 1908.

940,343. Patented Nov. 16; 1909.

Witnesses. 52w; 7c.

UNITED STATES PATENT ,tlFldlQE.

OTTO AUGUST FRANZ MITTELSTADT, OF HOI-IE1\T$AATHEN-ON-THE-ODER, GERMANY.

TIRE-SHIELD.

T 0 all whom it may concern:

Be it known that I, Or'ro AUGUST FRANZ MITTELSTADT, a subject of theGerman Emperor, and resident of Hohensaathen-onthe()der, Germany, haveinvented certain new and useful Improvements in Tire- Shields, of whichthe following is a specification.

The present invention relates to improvements in tire shields forprotecting tires from abrasion and at the same time main taining theresiliency of such tires under the varying pressure of loads and shocks.

My invention refers more particularly to that class of shields in whichthe shield is composed of a plurality of sections or portions adapted tooverlap one another and to be attached to supporting means.

The object of my invention is to provide a protecting shield or casingmade in sections and surrounding the tire subjected to abrasion, and toconect the end of each section, which overlaps the free end of thepreceding section, to supporting means which are attached to the spokesof the wheel, said supporting means being adapted to be moved oradjusted in radial direction, in order to obviate the disengagement ofthe under and over lapping ends of the sections when the tire is underload.

\Vith this object in view my invention consists in certain novelfeatures of construction and combinations of parts as will behereinafter fully described and pointed out in the claims with referenceto the accompanying sheets of drawings, wherein- Figure 1 is a sideelevation, partly in section, of a part of a wheel provided with myimproved shield sections or shoes; and Fig. 2 is a transverse section ofthe same on line T-II of Fig. 1.

Similar characters of reference refer to like parts in both of thefigures.

In said drawings r designates the rim, 8 the spokes, and b are two solidrubber tires attached to the rim and arranged to leave between them acentral circular space or channel, a is the U-shaped shoe orshieldsection provided with a wooden filling piece or pad (Z coveredwith a rubber lining c, g g are guide pieces firmly connected wlth thespoke, f f are the supporting rods to which the end of the shoeoverlapping the tongue 2' of the preceding shoe is attached by means ofpins 7, h h are the nuts for Specification of Letters Patent.

Application filed. March 11, 1908.

Patented Nov. 16, 1909.

Serial No. 420,517.

adjusting the supporting rods in radial direction.

The shoe a is fitted upon the pins 7 with oval slots Z allowing of aslight tangential displacement of the shoe with respect to the tires 6and 6 Each shoe a is provided with a stop piece at projecting into thechannel between the tires Z2 and A corresponding inverted stop piece ais attached to the rim T the said stop pieces are so arranged as tostand a little distance apart from each other. The length of thisdistance is equal or nearly equal to the length of the play of the pinsf in the oval slots Z.

When the wheel or motor car is braked, the shoe or shoes a receive bytheir friction on the ground a tangential displacement until the stoppiece at strikes against the stop piece 71, whereby the relativemovement of the shoe is barred. Any further tangential strain orpressure caused on the shoe by the braking of the motor car is thendirectly and positively transmitted by the said stop pieces to the wheelrim, so as to relieve the tire or tires from undue strain.

By the initial relative displacement of the shoe the tire or tires aresubjected to a slight tangential compression which is sufiicient whenthe braking ceases, to bring back the said shoe into its originalposition and to separate thereby the stop pieces so that in ordinarydriving the latter are prevented from sliding or grinding upon oragainst each other.

As many changes might be made in the construction and relativearrangement of the diiferent parts without involving a departure fromthe spirit of my invention, I would have it understood that I do notlimit myself to the exact constructions shown and described, butconsider myself at liberty to make such changes and alterations as fallwithin the scope of my invention.

I claim:

1. The combination with a wheel, of a pair of tires mounted on the rimthereof forming an annular channel between them, a plurality ofoverlapping shoes covering the tires, longitudinally movable rodsconnected to the shoes, radially disposed stops mounted on the wheelrim, and a stop connected with each shoe normally distanced from the rimstops and adapted to engage the latter.

2. The combination with a wheel, of a air of tires mounted on a rimthereof orming an annular channel between them, a filling piecesurrounding the tread of the tires, a plurality of overlapping shoescovering the filling piece, rods connected to the shoes, mounted on thewheel spokes and movable longitudinally thereof, radially disposed stopsmounted on the wheel rim, and a stop connected with each shoe normallydistanced from the rim stops and adapted to engage the latter.

3. The combination with a wheel, of a pair of tires mounted on the rimthereof forming an annular channel between them,- a filling piecesurrounding the tread of the tires, a plurality of overlapping shoescover ing the filling piece, connecting rods mounted on the wheel spokesand adapted to move longitudinally thereof, radially disposed stopsmounted on the wheel-rim, a stop connected with each shoe normallydistanced from the rim-stops and adapted to engage the latter, and pinsmounted in the ends of the connecting rods taking through slots formedin one end of the shoes for the pur- 25 pose specified.

OTTO AUG. FRANZ MITTELSTKDT. Witnesses CARL GILNER, RICHARD JESOM.

